KR100421548B1 - Reach-type electric forklift truck with driver seat - Google Patents

Abstract

The present invention relates to a reach type electric forklift truck having a driver's seat. In a rich forklift truck having excellent workability in a narrow work environment, a rear wheel that serves as a driving wheel and a steering wheel, and a driving motor that applies driving force to the rear wheel are mounted on the inner circumferential surface of the rear wheel while being fitted to the rotational axis of the rear wheel, and thus the driving motor is mounted. The driver's seat is provided in the space secured by changing the. In addition, in connecting the wheel support including the rear wheels, in which the drive motor is assembled, to the vehicle body, the conventional coil spring is switched to the leaf spring for strong anti-vibration and longer life, while the driver sits in the center position of the forklift. It provides a forklift-type electric forklift that can contribute to the improvement of work efficiency in narrow places and the prevention of safety accidents by allowing the operator to operate while watching the fork in the front.

Description

Reach-type electric forklift truck with driver's seat {.}

The present invention relates to a forklift, and more particularly, in a small reach type forklift that can work in a narrow work space, by changing the mounting position of the drive motor, while ensuring a space in which the driver can work while sitting. By connecting the rear wheel and the rear wheel body assembled with the driving motor to the leaf spring, it is possible to achieve strong vibration prevention and life extension by switching to the leaf spring, while the driver can operate while watching the fork in the front while sitting at the center position of the forklift. It is to provide a seated reach type electric forklift that can greatly contribute to improving work efficiency in a narrow place and preventing safety accidents of workers.

In general, the forklift is divided into an engine forklift and an electric forklift according to a power source. An electric forklift has a battery for supplying power and an electric motor for driving the battery. It is divided into counter balance type and reach type. The counter balance type is designed to load cargo with the fork protruding toward the front of the vehicle body, and the cargo loaded behind the vehicle body. It is a structure equipped with counter weight, which is a heavy weight to maintain the balance with the front wheel, and the front wheel is driven for the reach operation of the fork, and the rear wheel is steered to be used when handling relatively heavy materials. .

Reach-type electric forklifts are compactly designed for use in relatively small spaces, and have a driving mechanism driven mainly by electric motors. While the rear wheels are steered, the reach type electric forklift truck takes the form of driving and steering on the rear wheels. In addition, it is common to take the form of a three-wheeled system consisting of a pair of front wheels and one rear wheel to minimize the turning radius for work, so that the rear wheels can be paired with one auxiliary wheel so that it can be driven more stably. It is also produced.

The reach type electric forklift includes two front wheels serving as driven wheels, one rear wheel serving as a driving wheel and a steering wheel, a driving unit including a driving motor and a steering device for providing driving power to the rear wheels, and a power source required for the driving unit. It is equipped with a structure to install a battery to provide a control unit for controlling the fork and the master.

The problem with the conventional reach type electric forklift is that the operator's convenience is excluded in the design process considering the arrangement of the driver's seat and the workability and maneuverability in a narrow space.

Figure 1 shows an example of a conventional reach type electric forklift.

Referring to this figure, the conventional reach type electric forklift 1 is provided with a rod wheel 3 serving as a front wheel in the front in which the fork 2 is installed, and a driver wheel 4 and a caster wheel 4a in the rear. The rear wheel is configured, and the steering wheel (5) and the drive motor (6) consisting of the hydraulic motor (5a), the hydraulic cylinder (5b), the handle (5c) is installed on the upper portion of the driver wheel (4).

As the driver wheel 4 and the caster wheel 4a are arranged at appropriate intervals for dispersing their own weight, the drive motor 6 occupies either space at the rear of the electric forklift truck. Therefore, as the driver's seat 7 on which the operator boards is formed in a space on one side where the driving motor 6 is installed, the operator's line of sight cannot be located in the center of the electric forklift, so it is not easy to check the front object, so that the fork and the master There is an inconvenience to be steered in a state inclined to one side from the front line of the eye, and the steering wheel 5c in the lateral direction.

Another problem posed by the conventional reach type electric forklift truck is that the seat is not provided in the driver's seat 7 so that the worker can continue to stand. The reason why the seat is not provided in the rich type electric forklift is due to the reason that the device should be relatively small in size and simplified in consideration of workability in a narrow space which is a characteristic of the rich type electric forklift. When a worker stands up for a long time, there is a problem of a safety accident due to a misoperation and a decrease in work efficiency.

In the case of a load balancing design such as an automatic hydraulic control device suitable for transporting a heavy body such as a counterbalanced electric forklift, a seat is usually provided in the driver's seat, which alleviates the impact from the driver wheel and the caster wheel. Suspension system is a cushioning structure by coil spring, and the components are complicatedly assembled and wear of parts is rapidly progressed due to repeated impacts. It is necessary to replace the parts such as, or regular inspection, and in particular, it is not easy to replace the structural parts of the complex suspension system.

The present invention provides a driver's seat using a space formed by directly attaching a hydraulic motor and a driving motor to the driving wheels, which have the same linear rotational axis as the rear wheels that combine the driving wheel and the steering wheel in a rich forklift having excellent workability in a narrow working environment. By having the seat in the driver's seat by the simple and sturdy suspension structure while being located at the center of the forklift truck, it is possible to operate the fork from the front of the worker while the worker is sitting, improving work efficiency in a narrow place. To provide a rich electric forklift that can greatly contribute to the prevention of safety accidents and workers.

To this end, the present invention changes the position of the drive motor and converts the coil spring used in the conventional suspension device into a leaf spring.

In addition, the present invention proposes a structure that can be configured to the number of the rear wheels from one to two for the user's various choices, in particular in the structure having two rear wheels, by connecting the rear wheel and the leaf spring hinged We suggest a connection that can always be in horizontal contact with the ground.

In the conventional reach type driver, the deceleration of the vehicle body is operated by the foot and the acceleration is operated by the hand, but if the driver performs the driving in the seated state as in the present invention, the acceleration may be operated by the foot, Since this can be easily changed by those skilled in the art, the present invention excludes the above configuration.

1 is a perspective view showing an example of a conventional reach type electric forklift

2 is a front view of a three-wheel reach type electric forklift truck to which the present invention is applied.

3 is a side view of a three-wheel reach type electric forklift truck to which the present invention is applied.

4 is an enlarged view of a part of the three-wheel reach type electric forklift truck to which the present invention is applied.

5 is a front view of a four-wheel reach type electric forklift truck to which the present invention is applied.

6 is a side view of a four-wheel reach type electric forklift truck to which the present invention is applied.

Figure 6a is a side view of the caster of the four-wheel reach type electric forklift truck applied to the present invention

7 is an enlarged view of a part of the four-wheel reach type electric forklift truck to which the present invention is applied.

Figure 8 is an enlarged partial cross-sectional view of the suspension of the four-wheel reach type electric forklift truck to which the present invention is applied

Figure 9a is a view when the four-wheel forklift to be applied to the present invention when working in a horizontal plane

Figure 9b is a view when the four-wheel forklift truck applied to the present invention when working on the inclined surface

The present invention for achieving the above object is to form a rich electric forklift having a pair of front wheels and a rear wheel driven and steered by the drive motor and the steering device, the known drive motor having a brake means rear wheel The driver's seat is provided on the axle to be installed so that the rear axle becomes the output shaft of the driving motor, and a driver's seat having a suspension device is formed in a space at the rear center of the electric forklift.

The forklift to which the present invention is applied may be a three-wheeled or four-wheeled type electric forklift that performs a rich motion in which the master assembly moves back and forth with respect to the vehicle body along the rich leg, and these rich electric forklifts are front of the vehicle body. As the master assembly and the fork is formed, and a steering device including a handle is provided, a pair of rod wheels are installed on the front lower body and a driver wheel is formed on the rear lower body.

In the suspension of the present invention, in the case of three wheels in which one driver wheel is installed as a rear wheel capable of driving and steering, the driver wheel is fixed to the center of the leaf spring support that is installed in the driver's seat. In the case of four wheels provided with a wheel, a driver wheel and a caster wheel may be respectively provided at both ends of the wheel support in which a central portion is rotatably installed on the spring support.

As described above, the present invention enables the driver's seat to be formed in the center by using the rear space of the electric forklift that is secured as the position of the driving motor moves in the lateral direction of the rear wheel. In addition, the suspension of the driver's seat is more rigid and safe by using a pair of leaf springs without using a coil spring as in the prior art.In the case of four wheels, the center of the wheel support is rotatably installed on the spring support, thereby making it uneven. Lifting from side to side with respect to the ground cooperates with the leaf spring to provide a synergistic effect on suspension.

DETAILED DESCRIPTION Embodiments of the present invention described above will be described with reference to the accompanying drawings.

In the following embodiments, reference numerals quoted from the drawings indicate parts that appear in the drawings, and parts of the parts not shown in the drawings as well-known components, for example, steering devices, etc., are not described.

2 to 4 show a three-wheel reach forklift to which the present invention is applied.

First, referring to FIG. 2, the three-wheel reach forklift 10 has a master assembly 11 and a fork 12 formed in a conventional structure, and a handle 13 that forms a known steering device is formed in a driver's seat. In the lower body, a pair of rod wheels 14 and a driver wheel 15 are formed.

The driver wheel 15 is steered by a conventional steering device that changes the rotation angle of the driver wheel 15, which is a steering wheel, when the steering rod rotates by the steering wheel 13 and is transmitted to the transfer by the ring gear. On both sides, drive motors 16 and magnetic brakes 17 are provided, respectively.

The drive motor 16 is a drive motor driven by a battery mounted in the rich forklift, and the output shaft becomes an input shaft for transmitting power to the driver wheel 15.

The driver wheel 15 including the drive motor 16 and the magnetic brake 17 is a well-known mechanism, and thus descriptions of specific configurations will be omitted.

A steering bearing 18 is installed at the upper portion of the drive motor 16, which is connected to the steering apparatus, and the steering bearing 18 is fixed to the spring support 19.

The spring support 19 is fixed to the lower end of the pair of leaf springs 20 and 20a, and the leaf springs 20 and 20a are fixed to the seat support 22 to which the driver's seat 21 is fixed.

The driver's seat 21 is different from the conventional structure in which the drive motor 16 for driving the driver wheel 15 is installed on the upper part of the driver wheel 15. Space is secured at the top to be located at the rear center of the three-wheeled forklift 10 as intended by the present invention.

In the rich-type electric forklift of this embodiment, the master cylinder is driven in accordance with a switch-on operation performed by a worker to lift a load in a rich state as in a conventional driving method, and the master assembly moves forward to be in a rich out state. When the operator turns off the reach switch in such a state, the master cylinder moves backward and the master cylinder moves backward together to reach a rich state. It is possible to install the driver's seat 21 by structural change of the position at which the driving motor 16 is installed. The operator can conveniently work in a sitting posture, and the driver's seat 21 is installed at the rear center of the master assembly 11 so that the operator can operate the fork while the operator is in front of the work object. The rich operation of can be performed smoothly. In addition, by adopting the leaf spring (20, 20a) as a suspension device can be installed firmly the driver's seat (21) and prevents vibration and shock generated while moving to maintain a comfortable ride.

The present invention is not limited to the three-wheel reach forklift 10 described above, which can be applied to a reach-type electric forklift that carries a relatively light body, and can be easily modified by those skilled in the art. have.

5 to 6 and 8 show an embodiment in which the present invention is applied to a four-wheel reach forklift.

This embodiment adds a structure for buffering the driver wheel and the caster wheel constituting the four wheels.

Referring to FIG. 5, the four-wheel reach forklift 100 includes a master assembly 101 and a fork 102 having a conventional structure, such as the three-wheel reach forklift 10, and a known steering device in the driver's seat. Handle 103 is formed, and the lower body is formed with a pair of rod wheels 104, one driver wheel 105 and the caster wheel (300).

The driver wheel 105 is steered by a conventional steering device for changing the rotation angle of the driver wheel 105 which is a steering wheel when the steering rod rotates by the steering wheel 103 and is transmitted to the transfer by the ring gear, Both sides are provided with a driving motor 106 and a magnetic brake 107 as in the above-described embodiment, and a steering bearing 108 connected to the steering device is provided on the upper part of the driving motor 106. The lower end of the pair of leaf springs 200 and 200a is fixed to the spring support 109, and the leaf springs 200 and 200a are fixed to the seat support 202 to which the driver's seat 201 is fixed.

The caster wheel is installed so that the wheel support shaft and the center axis of the wheel are deflected on the same line as shown in FIG. 6A so that the driving directions of the drive driver wheel and the caster wheel are always horizontal regardless of the steering of the drive driver wheel.

As for the driver's seat 201, the drive motor 106 for driving the driver wheel 105 is installed on the side of the driver wheel 105 as in the above-described embodiment, so that a space is secured on the upper part of the driver wheel 105 and the four wheels are secured. The rear center of the forklift 100 is installed.

The structural feature in this embodiment is to fix the driver wheel 105 and the caster wheel 300 to the wheel support 110 for the buffering action of the driver wheel 106 and the caster wheel 300, the spring support 109 The vertical arms 109a and 109b are formed on both sides thereof, and the wheel support 110 is rotatably fixed to the fixed shaft 111 fixed to the ends of the vertical arms 109a and 109b.

At the ends of the vertical arms 109a and 109b, shaft holes 112 and 112a into which the fixed shaft 111 is inserted are drilled to insert the bushes 113 and 113a.

The wheel support 110 is formed in a rectangular horizontal plane while the driver wheel 105 and the caster wheel 300 is fixed to both ends of the horizontal plane, both sides of the shaft hole 114 is inserted into the fixed shaft 111 in the lower center Bushes 115 and 115a are inserted into the inlet.

The wheel support 110 is disposed between the vertical arms 109 and 109a such that the shaft hole 114 is concentric with the shaft holes 112 and 112a formed in the vertical arms 109 and 109a of the spring support 109. And is rotatably fixed by the fixed shaft 111 passing through the shaft holes 112, 112a and 114.

The fixed shaft 111 has a head 115 formed at one end, and a pin 116 is inserted at the other end to be fixed to the vertical arms 109 and 109a.

The four-wheel reach type electric forklift of the above embodiment is operated as in a conventional driving method, and the driver's seat 201 can be installed by structural change of the position at which the driving motor 106 is installed. It is possible to work conveniently, and the position where the driver's seat 201 is installed at the rear center of the master assembly 101 enables the fork to be operated while the operator is located in the front, thereby smoothing the rich operation of the work object. It can be done. In addition, by adopting the leaf springs 200 and 200a as the suspension device, the driver's seat 201 can be firmly installed, and by installing the hinge 201, the leaf springs 200 and 200a smoothly operate in absorbing the impact. When the wheel support 110 is rotated to the left and right around the fixed shaft 111 so that the moving ground is uneven, the driver wheel 105 or the caster wheel 300 is about 50 to 70 mm. Rotation up and down primarily absorbs vibration and shock, and the remaining vibration and shock are absorbed by the leaf springs 200 and 200a.

Figures 9a and 9b is a diagram showing the left lift type forklift produced by the present invention when working in the plane and the inclined surface ground surface. As shown in FIG. 9B, the rear wheel portion is hinged by a mandrel even when the vehicle body and the ground are not horizontal, so that the wheel support is operated horizontally with the ground, so that the driving driver wheel and the caster wheel are always in close contact with the ground.

The present invention as described above has a driver's seat seat that can be seated by the operator using a space formed on the upper part of the forklift truck by directly attaching a drive motor having a linear rotational axis identical to the drive shaft of the driver wheel to the driver wheel. By doing so, the fork can be operated and the operator can work from the front while sitting, and the suspension and vibration by the leaf spring can be alleviated the impact and vibration to reduce the fatigue of the operator, the workability is greatly improved.

In addition, the driver driver wheel and the caster are in contact with the ground so that there is no uneven wear of the tire, and the disassembly and assembly are simple, and it is easy to maintain the forklift. By making it possible to see and operate, it can greatly contribute to the improvement of work efficiency in the narrow place and the prevention of worker safety accidents.

Claims (3)

In forming a rich electric forklift having a pair of front wheels and a rear wheel driven and steered for the driving motor and the steering apparatus, The master assembly 11 and the fork 12 are formed, the handle 13 is formed in the driver's seat constituting a known steering device, the lower body is formed with a pair of rod wheels 14 and one driver wheel 15 Become, The driver wheel 15 is steered by a conventional steering device that changes the rotation angle of the driver wheel 15, which is a steering wheel, when the steering rod rotates by the steering wheel 13 and is transmitted to the transfer by the ring gear. Each side is provided with a drive motor 16 and a magnetic brake 17, The drive motor 16 is a drive motor driven by a battery mounted in the rich forklift, and the output shaft is an input shaft for transmitting power to the driver wheel 15, and is connected to a steering device on the top of the drive motor 16. The steering bearing 18 is installed, the steering bearing 18 is fixed to the spring support 19, the spring support 19 is fixed to the lower end of the pair of suspension, the suspension is the driver's seat A drive motor 16 fixed to the seat support 22 to which the 21 is fixed and driving the driver wheel 15 is installed on the side of the driver wheel 15 so as to be spaced above the driver wheel 15. A rich electric forklift having a driver's seat, characterized in that it has a driver's seat (21). The master assembly 101 and the fork 102 are formed, the steering wheel 103 is formed in the driver's seat constituting a known steering device, the lower body has a pair of rod wheels 104, one driver wheel 105 and the caster Wheel 300 is formed, The driver wheel 105 is steered by a conventional steering device for changing the rotation angle of the driver wheel 105 which is a steering wheel when the steering rod rotates by the steering wheel 103 and is transmitted to the transfer by the ring gear, Each side is provided with a drive motor 106 and a magnetic brake 107, and a steering bearing 108 connected to a steering device is provided on the top of the drive motor 106, and a pair of spring supports 109 is provided. The lower end is fixed by the suspension of the suspension, the suspension is fixed to the seat support 202 to which the driver's seat 201 is fixed, The caster wheel is installed so that the wheel support shaft and the wheel central axis are deflected on the same line, The driver's seat 201 is characterized in that a driving motor 106 for driving the driver wheel 105 is installed at the side of the driver wheel 105, and the driver's seat 21 is provided in a space above the driver wheel 105. Rich type electric forklift provided with a driver's seat. The method of claim 1, wherein Suspension device is a leaf-type electric forklift having a driver's seat, characterized in that consisting of leaf spring (200, 200a).